Perform build and magnum tuning

Building o//third_party/python now takes 5 seconds on my PC

This change works towards modifying Python to use runtime dispatching
when appropriate. For example, when loading the magnums in the socket
module, it's a good idea to check if the magnum is zero, because that
means the local system platform doesn't support it.

third_party/python/Modules/clinic/_bz2module.inc

@@ -0,0 +1,178 @@
+/* clang-format off */
+/*[clinic input]
+preserve
+[clinic start generated code]*/
+
+PyDoc_STRVAR(_bz2_BZ2Compressor_compress__doc__,
+"compress($self, data, /)\n"
+"--\n"
+"\n"
+"Provide data to the compressor object.\n"
+"\n"
+"Returns a chunk of compressed data if possible, or b\'\' otherwise.\n"
+"\n"
+"When you have finished providing data to the compressor, call the\n"
+"flush() method to finish the compression process.");
+
+#define _BZ2_BZ2COMPRESSOR_COMPRESS_METHODDEF    \
+    {"compress", (PyCFunction)_bz2_BZ2Compressor_compress, METH_O, _bz2_BZ2Compressor_compress__doc__},
+
+static PyObject *
+_bz2_BZ2Compressor_compress_impl(BZ2Compressor *self, Py_buffer *data);
+
+static PyObject *
+_bz2_BZ2Compressor_compress(BZ2Compressor *self, PyObject *arg)
+{
+    PyObject *return_value = NULL;
+    Py_buffer data = {NULL, NULL};
+
+    if (!PyArg_Parse(arg, "y*:compress", &data)) {
+        goto exit;
+    }
+    return_value = _bz2_BZ2Compressor_compress_impl(self, &data);
+
+exit:
+    /* Cleanup for data */
+    if (data.obj) {
+       PyBuffer_Release(&data);
+    }
+
+    return return_value;
+}
+
+PyDoc_STRVAR(_bz2_BZ2Compressor_flush__doc__,
+"flush($self, /)\n"
+"--\n"
+"\n"
+"Finish the compression process.\n"
+"\n"
+"Returns the compressed data left in internal buffers.\n"
+"\n"
+"The compressor object may not be used after this method is called.");
+
+#define _BZ2_BZ2COMPRESSOR_FLUSH_METHODDEF    \
+    {"flush", (PyCFunction)_bz2_BZ2Compressor_flush, METH_NOARGS, _bz2_BZ2Compressor_flush__doc__},
+
+static PyObject *
+_bz2_BZ2Compressor_flush_impl(BZ2Compressor *self);
+
+static PyObject *
+_bz2_BZ2Compressor_flush(BZ2Compressor *self, PyObject *Py_UNUSED(ignored))
+{
+    return _bz2_BZ2Compressor_flush_impl(self);
+}
+
+PyDoc_STRVAR(_bz2_BZ2Compressor___init____doc__,
+"BZ2Compressor(compresslevel=9, /)\n"
+"--\n"
+"\n"
+"Create a compressor object for compressing data incrementally.\n"
+"\n"
+"  compresslevel\n"
+"    Compression level, as a number between 1 and 9.\n"
+"\n"
+"For one-shot compression, use the compress() function instead.");
+
+static int
+_bz2_BZ2Compressor___init___impl(BZ2Compressor *self, int compresslevel);
+
+static int
+_bz2_BZ2Compressor___init__(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    int return_value = -1;
+    int compresslevel = 9;
+
+    if ((Py_TYPE(self) == &BZ2Compressor_Type) &&
+        !_PyArg_NoKeywords("BZ2Compressor", kwargs)) {
+        goto exit;
+    }
+    if (!PyArg_ParseTuple(args, "|i:BZ2Compressor",
+        &compresslevel)) {
+        goto exit;
+    }
+    return_value = _bz2_BZ2Compressor___init___impl((BZ2Compressor *)self, compresslevel);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(_bz2_BZ2Decompressor_decompress__doc__,
+"decompress($self, /, data, max_length=-1)\n"
+"--\n"
+"\n"
+"Decompress *data*, returning uncompressed data as bytes.\n"
+"\n"
+"If *max_length* is nonnegative, returns at most *max_length* bytes of\n"
+"decompressed data. If this limit is reached and further output can be\n"
+"produced, *self.needs_input* will be set to ``False``. In this case, the next\n"
+"call to *decompress()* may provide *data* as b\'\' to obtain more of the output.\n"
+"\n"
+"If all of the input data was decompressed and returned (either because this\n"
+"was less than *max_length* bytes, or because *max_length* was negative),\n"
+"*self.needs_input* will be set to True.\n"
+"\n"
+"Attempting to decompress data after the end of stream is reached raises an\n"
+"EOFError.  Any data found after the end of the stream is ignored and saved in\n"
+"the unused_data attribute.");
+
+#define _BZ2_BZ2DECOMPRESSOR_DECOMPRESS_METHODDEF    \
+    {"decompress", (PyCFunction)_bz2_BZ2Decompressor_decompress, METH_FASTCALL, _bz2_BZ2Decompressor_decompress__doc__},
+
+static PyObject *
+_bz2_BZ2Decompressor_decompress_impl(BZ2Decompressor *self, Py_buffer *data,
+                                     Py_ssize_t max_length);
+
+static PyObject *
+_bz2_BZ2Decompressor_decompress(BZ2Decompressor *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"data", "max_length", NULL};
+    static _PyArg_Parser _parser = {"y*|n:decompress", _keywords, 0};
+    Py_buffer data = {NULL, NULL};
+    Py_ssize_t max_length = -1;
+
+    if (!_PyArg_ParseStack(args, nargs, kwnames, &_parser,
+        &data, &max_length)) {
+        goto exit;
+    }
+    return_value = _bz2_BZ2Decompressor_decompress_impl(self, &data, max_length);
+
+exit:
+    /* Cleanup for data */
+    if (data.obj) {
+       PyBuffer_Release(&data);
+    }
+
+    return return_value;
+}
+
+PyDoc_STRVAR(_bz2_BZ2Decompressor___init____doc__,
+"BZ2Decompressor()\n"
+"--\n"
+"\n"
+"Create a decompressor object for decompressing data incrementally.\n"
+"\n"
+"For one-shot decompression, use the decompress() function instead.");
+
+static int
+_bz2_BZ2Decompressor___init___impl(BZ2Decompressor *self);
+
+static int
+_bz2_BZ2Decompressor___init__(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+    int return_value = -1;
+
+    if ((Py_TYPE(self) == &BZ2Decompressor_Type) &&
+        !_PyArg_NoPositional("BZ2Decompressor", args)) {
+        goto exit;
+    }
+    if ((Py_TYPE(self) == &BZ2Decompressor_Type) &&
+        !_PyArg_NoKeywords("BZ2Decompressor", kwargs)) {
+        goto exit;
+    }
+    return_value = _bz2_BZ2Decompressor___init___impl((BZ2Decompressor *)self);
+
+exit:
+    return return_value;
+}
+/*[clinic end generated code: output=7e57af0b368d3e55 input=a9049054013a1b77]*/